Class: RailsErrorDashboard::Services::DiagnosticDumpGenerator

Inherits:
Object
  • Object
show all
Defined in:
lib/rails_error_dashboard/services/diagnostic_dump_generator.rb

Overview

Pure algorithm: Capture on-demand diagnostic snapshot of current system state

Aggregates data from existing services (zero duplication):

  • SystemHealthSnapshot: GC, memory, threads, connection pool, Puma, job queue

  • EnvironmentSnapshot: Ruby/Rails versions, gems, server, DB adapter

  • BreadcrumbCollector: Current thread’s breadcrumb buffer (non-destructive)

Additional data unique to diagnostic dumps:

  • Per-thread info (name, status, alive)

  • Full GC.stat (SystemHealthSnapshot only captures a subset)

  • ObjectSpace.count_objects (O(1) type counts — NOT each_object)

  • Process uptime

SAFETY RULES (HOST_APP_SAFETY.md):

  • Every section individually wrapped in rescue => nil

  • Never raises — returns partial dump on error

  • No ObjectSpace.each_object (banned rule #8)

  • No Thread.list.map(&:backtrace) (GVL hold)

  • No Signal.trap (banned rule #9)

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.call ⇒ Object 



25
26
27
 
# File 'lib/rails_error_dashboard/services/diagnostic_dump_generator.rb', line 25

def self.call
  new.call
end

Instance Method Details

#call ⇒ Object 



29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
 
# File 'lib/rails_error_dashboard/services/diagnostic_dump_generator.rb', line 29

def call
  {
    captured_at: Time.current.iso8601,
    pid: Process.pid,
    uptime_seconds: process_uptime,
    environment: environment_info,
    system_health: system_health,
    breadcrumbs: breadcrumbs,
    threads: thread_info,
    gc: gc_info,
    object_counts: object_counts
  }
rescue => e
  { captured_at: Time.current.iso8601, error: e.message }
end